Restorative Dentistry and Endodontics

  • 제28권6호
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  • Pages.491-497
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  • 2003
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  • 2234-7658(pISSN)
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  • 2234-7666(eISSN)
대한치과보존학회 (The Korean Academy of Conservative Dentistry)
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혼성층의 두께가 three-step과 self-etching 상아질 접착제의 미세인장결합강도에 미치는 효과

THE EFFECT OF HYBRID LAYER THICKNESS ON MICROTENSILE BOND STRENGTH OF THREE-STEP AND SELF-ETCHING DENTIN ADHESIVE SYSTEMS

  • 이혜정 (부산대학교 치과대학 보존학교실) ;
  • 박정길 (부산대학교 치과대학 보존학교실) ;
  • 허복 (부산대학교 치과대학 보존학교실)
  • Lee, Hye-Jung (Department of Conservative dentistry, College of Dentistry, Pusan National University) ;
  • Park, Jeong-Kil (Department of Conservative dentistry, College of Dentistry, Pusan National University) ;
  • Hur, Bock (Department of Conservative dentistry, College of Dentistry, Pusan National University)
  • 발행 : 2003.11.01
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초록

The purpose of this study was to evaluate the correlation between hybrid layer thickness and bond strength using confocal laser scanning microscope and microtensile bond strength test of two adhesive systems. The dentin surface of human molars. sectioned to remove the enamel from the occlusal surface. Either Scotchbond Multi-Purpose(3M Dental Product, St. Paul, MN, U.S.A) or Clearfil SE Bond (Kuraray, Osaka, Japan) was bonded to the surface. and covered with resin-composite. The resin-bonded teeth were serially sliced perpendicular to the adhesive interface to measure the hybrid layer thickness by confocal laser scanning microscope. The specimen were trimmed to give a bonded cross-sectional surface area of $1\textrm{mm}^2$, then the micro-tensile bone test was performed at a cross head speed of 1.0 mm/min. All fractured surfaces were also observed by stereomicroscope. There was no significant differences in bond strengths the materials(p>0.05). However. the hybrid layers of three-step dentin adhesive system, SM, had significantly thicker than self-etching adhesive system. CS(p<0.05). Pearson's correlation coefficient showed no correlation between hybrid layer thickness and bond strengths(p>0.05). Bond strengths of dentin adhesive systems were not dependent on the thickness of hybrid layer.

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